package com.wan.mail;



import com.rabbitmq.client.Channel;
import com.wan.server.pojo.Employee;
import com.wan.server.pojo.MailConstants;
import org.slf4j.LoggerFactory;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.support.AmqpHeaders;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.mail.MailProperties;
import org.springframework.data.redis.core.HashOperations;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.mail.javamail.JavaMailSender;
import org.springframework.mail.javamail.MimeMessageHelper;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageHeaders;
import org.springframework.stereotype.Component;

import org.slf4j.Logger;
import org.springframework.web.bind.annotation.ResponseBody;
import org.thymeleaf.TemplateEngine;
import org.thymeleaf.context.Context;

import javax.mail.internet.MimeMessage;
import java.io.IOException;
import java.util.Date;

/**
 * Description: 消息接收者
 * date: 2021/12/24 17:49
 *
 * @author 万富
 * @since JDK 1.8
 */
@Component
public class MailReceiver {

    private static final Logger LOGGER = LoggerFactory.getLogger(MailReceiver.class);

    @Autowired
    private JavaMailSender javaMailSender;
    @Autowired
    private MailProperties mailProperties;
    @Autowired
    private TemplateEngine templateEngine;
    @Autowired
    private RedisTemplate redisTemplate;

    @RabbitListener(queues = MailConstants.MAIL_QUEUE_NAME)
    public void handler(Message message, Channel channel){
        Employee employee = (Employee) message.getPayload();
        MessageHeaders headers = message.getHeaders();
        // 消息序号
        Long tag = (Long)headers.get(AmqpHeaders.DELIVERY_TAG);
        String msgId = (String)headers.get("spring_returned_message_correlation");

        HashOperations hashOperations = redisTemplate.opsForHash();

        MimeMessage msg = javaMailSender.createMimeMessage();
        MimeMessageHelper helper = new MimeMessageHelper(msg);
        try {
            // 判断redis里面是否含有
            if (hashOperations.entries("mail_log").containsKey(msgId)) {
                LOGGER.info("消息已经被消费=====>",msgId);
                // 手动消息确认，  消息序号   是否确认多条
                channel.basicAck(tag,false);
                return;
            }
            // 发件人
            helper.setFrom(mailProperties.getUsername());
            // 收件人
            helper.setTo(employee.getEmail());
            // 主题
            helper.setSubject("入职欢迎邮件");
            // 发送日期
            helper.setSentDate(new Date());

            // 邮件内容
            Context context = new Context();
            context.setVariable("name",employee.getName());
            context.setVariable("posName",employee.getPosition().getName());
            context.setVariable("joblevelName",employee.getJoblevel().getName());
            context.setVariable("departmentName",employee.getDepartment().getName());

            // 内容解析
            System.out.println("context-------------------------------------------"+employee);
            String mail = templateEngine.process("mail", context);

            helper.setText(mail,true);
            //发送邮件
            javaMailSender.send(msg);
            LOGGER.info("邮件发送成功");
            // 将消息id，存入redis
            hashOperations.put("mail_log",msgId,"OK");
            // 手动发送消息确认
            channel.basicAck(tag,false);
        }catch (Exception e){
            try {
                // tag：消息序号    multi：是否确认多条  requeue：是否要退回到队列
                channel.basicNack(tag,false,true);
            } catch (IOException ex) {
                ex.printStackTrace();
            }
            LOGGER.error("邮件发送失败=====>{}",e.getMessage());
            e.printStackTrace();
        }
    }

}
